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High-thermal-conductivity low-expansion graphite for rocket engine jet pipe and preparation method of high-thermal-conductivity low-expansion graphite
The invention discloses high-thermal-conductivity low-expansion graphite for a rocket engine jet pipe. The high-thermal-conductivity low-expansion graphite is mainly prepared from petroleum coke powder, crystalline flake graphite powder and modified high-temperature asphalt. Wherein the modified high-temperature asphalt is obtained after high-temperature asphalt is subjected to sulfur vulcanization treatment. The preparation method of the graphite comprises the following steps: shaping petroleum coke and crystalline flake graphite, mixing and kneading the shaped petroleum coke and crystalline flake graphite with high-temperature modified pitch, flaking, crushing, standing, carrying out isostatic compaction, carbonizing and dipping, and finally graphitizing to obtain the high-thermal-conductivity low-expansion graphite. According to the graphite, the petroleum coke powder is used as a main material, the crystalline flake graphite is used as an auxiliary material, the sulfur modified asphalt is used as a binder, the types and proportion of aggregates are reasonably matched, the strength index of the graphite is basically kept, meanwhile, the high heat conductivity and the low expansion coefficient of the graphite can be effectively enhanced, and therefore the expansion coefficient difference between the graphite and refractory ceramics is reduced; and the use requirements of rocket engine nozzles are met.
本发明公开了一种火箭发动机喷管用的高导热低膨胀石墨，主要原料为石油焦粉、鳞片石墨粉和改质高温沥青；其中，改质高温沥青是将高温沥青经过硫磺硫化处理后得到的。该石墨的制备方法包括：将石油焦、鳞片石墨整形后，与高温改质沥青进行混捏、制片、粉碎、静置、等静压成型、炭化处理和浸渍处理，最后进行石墨化处理，得到高导热低膨胀石墨。本发明的石墨以石油焦粉为主料，鳞片石墨为辅料，以硫磺改质沥青为粘结剂，合理搭配骨料种类和配比，在基本保持石墨本身的强度指标的同时，还能有效增强石墨的高导热、低膨胀系数，从而减少与难熔陶瓷的膨胀系数差，满足火箭发动机喷管使用要求。
High-thermal-conductivity low-expansion graphite for rocket engine jet pipe and preparation method of high-thermal-conductivity low-expansion graphite
The invention discloses high-thermal-conductivity low-expansion graphite for a rocket engine jet pipe. The high-thermal-conductivity low-expansion graphite is mainly prepared from petroleum coke powder, crystalline flake graphite powder and modified high-temperature asphalt. Wherein the modified high-temperature asphalt is obtained after high-temperature asphalt is subjected to sulfur vulcanization treatment. The preparation method of the graphite comprises the following steps: shaping petroleum coke and crystalline flake graphite, mixing and kneading the shaped petroleum coke and crystalline flake graphite with high-temperature modified pitch, flaking, crushing, standing, carrying out isostatic compaction, carbonizing and dipping, and finally graphitizing to obtain the high-thermal-conductivity low-expansion graphite. According to the graphite, the petroleum coke powder is used as a main material, the crystalline flake graphite is used as an auxiliary material, the sulfur modified asphalt is used as a binder, the types and proportion of aggregates are reasonably matched, the strength index of the graphite is basically kept, meanwhile, the high heat conductivity and the low expansion coefficient of the graphite can be effectively enhanced, and therefore the expansion coefficient difference between the graphite and refractory ceramics is reduced; and the use requirements of rocket engine nozzles are met.
本发明公开了一种火箭发动机喷管用的高导热低膨胀石墨，主要原料为石油焦粉、鳞片石墨粉和改质高温沥青；其中，改质高温沥青是将高温沥青经过硫磺硫化处理后得到的。该石墨的制备方法包括：将石油焦、鳞片石墨整形后，与高温改质沥青进行混捏、制片、粉碎、静置、等静压成型、炭化处理和浸渍处理，最后进行石墨化处理，得到高导热低膨胀石墨。本发明的石墨以石油焦粉为主料，鳞片石墨为辅料，以硫磺改质沥青为粘结剂，合理搭配骨料种类和配比，在基本保持石墨本身的强度指标的同时，还能有效增强石墨的高导热、低膨胀系数，从而减少与难熔陶瓷的膨胀系数差，满足火箭发动机喷管使用要求。
High-thermal-conductivity low-expansion graphite for rocket engine jet pipe and preparation method of high-thermal-conductivity low-expansion graphite
一种火箭发动机喷管用的高导热低膨胀石墨及其制备方法
YANG CHENG (author) / XIONG HONGLI (author) / WANG XINHUA (author) / LIU JINPING (author) / WU ZHIGANG (author) / HE CHENGLIN (author) / ZHANG XILONG (author) / HUANG BIN (author) / CHEN BANGZHI (author) / CHEN HONG (author)
2024-09-13
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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